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sony-laptop: add high speed battery charging function

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Signed-off-by: Marco Chiappero <marco@absence.it>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Marco Chiappero 2012-05-19 22:35:55 +09:00 committed by Matthew Garrett
parent 54535d083f
commit 88bf170646
1 changed files with 86 additions and 0 deletions
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86
drivers/platform/x86/sony-laptop.c
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@ -155,6 +155,9 @@ static void sony_nc_thermal_resume(void);
static int sony_nc_lid_resume_setup(struct platform_device *pd);
static void sony_nc_lid_resume_cleanup(struct platform_device *pd);
static int sony_nc_highspeed_charging_setup(struct platform_device *pd);
static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd);
enum sony_nc_rfkill {
SONY_WIFI,
SONY_BLUETOOTH,
@ -1301,6 +1304,12 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up thermal profile function (%d)\n",
result);
break;
case 0x0131:
result = sony_nc_highspeed_charging_setup(pf_device);
if (result)
pr_err("couldn't set up high speed charging function (%d)\n",
result);
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_setup(device);
@ -1348,6 +1357,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x0122:
sony_nc_thermal_cleanup(pd);
break;
case 0x0131:
sony_nc_highspeed_charging_cleanup(pd);
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_cleanup();
@ -2246,6 +2258,80 @@ static void sony_nc_lid_resume_cleanup(struct platform_device *pd)
}
}
/* High speed charging function */
static struct device_attribute *hsc_handle;
static ssize_t sony_nc_highspeed_charging_store(struct device *dev,
struct device_attribute *attr,
const char *buffer, size_t count)
{
unsigned int result;
unsigned long value;
if (count > 31)
return -EINVAL;
if (kstrtoul(buffer, 10, &value) || value > 1)
return -EINVAL;
if (sony_call_snc_handle(0x0131, value << 0x10 | 0x0200, &result))
return -EIO;
return count;
}
static ssize_t sony_nc_highspeed_charging_show(struct device *dev,
struct device_attribute *attr, char *buffer)
{
unsigned int result;
if (sony_call_snc_handle(0x0131, 0x0100, &result))
return -EIO;
return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01);
}
static int sony_nc_highspeed_charging_setup(struct platform_device *pd)
{
unsigned int result;
if (sony_call_snc_handle(0x0131, 0x0000, &result) || !(result & 0x01)) {
/* some models advertise the handle but have no implementation
* for it
*/
pr_info("No High Speed Charging capability found\n");
return 0;
}
hsc_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
if (!hsc_handle)
return -ENOMEM;
sysfs_attr_init(&hsc_handle->attr);
hsc_handle->attr.name = "battery_highspeed_charging";
hsc_handle->attr.mode = S_IRUGO | S_IWUSR;
hsc_handle->show = sony_nc_highspeed_charging_show;
hsc_handle->store = sony_nc_highspeed_charging_store;
result = device_create_file(&pd->dev, hsc_handle);
if (result) {
kfree(hsc_handle);
hsc_handle = NULL;
return result;
}
return 0;
}
static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd)
{
if (hsc_handle) {
device_remove_file(&pd->dev, hsc_handle);
kfree(hsc_handle);
hsc_handle = NULL;
}
}
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
{